I'm thinking of upgrading to a LSD and i know there's two out there, the Steeda and one and Quaife. I've heard the Quaife one is better suited for auto-x, but its quite a bit more expensive than the Steeda one. My goal is to build a nice daily driver, who is a weekend auto-xer will I notice THAT much of a difference between the two?

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The Steeda one is a Torsen, which i believe is made for straight line performance? dont quote me on that. Torsen and Quaife are 2 good brands of LSD. I believe the quaife has some form of warranty associated with it, try looking into that.

One thing to remember is that adding an LSD is awesome for AutoX, but will put you in a much higher class. If you're concerned about being competitive in-class then that's something to think about, and to be the most competitve you'd probably want to go with the Quaife.

I cannot say that I really know how the 2 of them behave differently, so I don't feel qualified to give any more advice on the subject...

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i kinda doubt they would make a locking diff for a front wheel drive car, that would be very dangerous, and probably damage axles (unless the focus has stronger axles then i picture). One might be a tighter LSD than the other, but i seriously doubt one would be a full on locker.

__________________"I am free, no matter what rules surround me. If I find them tolerable, I tolerate them; if I find them too obnoxious, I break them. I am free because I know that I alone am morally responsible for everything I do." ~Robert A. Heinlein

Alright being that noone seems to be chiming in with the right info i'll give you the basics.
The quiafe and the torsen are relatively similar and they are both LSDs. the torsen is not a locking diff. the difference between the two is the amount of split between the wheels. I believe the quiafe is a 60-40 and the the torsen is a 65-35(might be a 70-30) i'm not positive on the numbers but i do know that the quiafe has a more even split than the torsen. They are both very good pieces and fuction extremely well when it comes to autocross. The difference between the two is very minimal between performance but the fact that the quiafe is rumered to have a waranty is worth looking into. As for the price i believe the difference in performance is not worth spending the extra couple hundred but if the quiafe has a warranty and thats something that you feel is nessary then you might not feel bad about spending that extra cash.

I myself went with the torsen t-2 diff for the focus. You can notice right from the start that it is a very well put together part. When you accelerate hard from the apex of a corner you can feel the torsen working as it jurks you around the rest of the corner. Also when you go to warm up your tires for the strip you notice that both tires are now spining the way they should be and you don't have the one wheel wonder that the factory part gave you. I have been extremely pleased with my t-2 diff and would not hesitate to buy another one. But after the abuse i've put mine through and the fact that it's holding up just fine i'm sure i won't have to.

Both are quality units. At the time when I got my Quaife, the prices were about the same, but Quaife had the advertised warranty, while Torsen's is implied. Both are equally strong units, with the Torsen having a slight higer biasing ratio.

But with the Quaife prices on the rise, the Torsen looks to be the better deal.

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